Spectrophotometric observations of the X-ray binary HD 153919 3U 1700-37

Details Spectrophotometric observations of the X-ray binary HD 153919 3U 1700-37 Spectrophotometric observations of the X-ray binary HD 153919 3U 1700-37

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976a%26a....47...19d&link_type=abstract

Astronomy and Astrophysics, vol. 47, no. 1, Feb. 1976, p. 19-30. Deutsche Forschungsgemeinschaft

Astronomy and Astrophysics

Astrophysics

14

Eclipsing Binary Stars, H Alpha Line, Spectrophotometry, X Ray Sources, Absorption Spectra, Cosmology, Light Curve, Line Shape, O Stars, Stellar Envelopes, X Ray Stars

Scientific paper

Spectrophotometric scans of the H-alpha line profile and photographic spectra in the wavelength region between 3400 and 6600 A are examined for possible periodic variations in the expanding envelope surrounding the O6.5f primary in the binary X-ray source HD 153919/3U 1700-37. It is found that the equivalent width of the H-alpha line apparently has a maximum value during the orbital half-period that is centered on the X-ray occultation and that the strength of the H-alpha emission tends to be minimal when the X-ray source transits the primary. Additional evidence for recurrent variations is found in the wings of the H-alpha line profile. Profiles obtained from photographic spectra of the H-beta and 5876-A He I lines, both of which have P Cygni-type characteristics, are compared with simultaneously observed H-alpha profiles; further indications of periodic variations in the envelope are discovered. Measurements of rotational broadening of the 4742-A He II absorption line are shown to reinforce the view that the rotational angular velocity of the primary is only about one-half the orbital angular velocity of the secondary. It is concluded that absorption of the low-energy tail of the variable X-radiation from the secondary by the primary's envelope is the most likely cause of the strong tendency for H-alpha minima to occur when the X-ray source is in front of the primary.

Affiliated with

Also associated with

No associations

Rating

Spectrophotometric observations of the X-ray binary HD 153919 3U 1700-37 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spectrophotometric observations of the X-ray binary HD 153919 3U 1700-37, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectrophotometric observations of the X-ray binary HD 153919 3U 1700-37 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1297039